He said: "We still have no word of a kick-off time but Lyon president Jean Michel Aulas has gone into the crowd to try and calm the situation".

It will be all to play for in the second leg in Genk after the Belgians lost an entertaining clash against Celta Vigo 3-2 in Spain.

"It seems hard to travel to Besiktas".

In the aftermath of that attack, which pushed the game back by 24 hours, UEFA had demanded a re-evaluation of the security measures "wherever necessary". "Well thankfully, if they hadn't invaded the pitch, they would have been trapped by Turkish fans who had turned up in strength, some without tickets".

After emerging from the tunnel, players from both teams clapped the fans before the match got underway.